Hublot has a multi-European pedigree: a Swiss watchmaker named after the French word for porthole by Italian founder Carlo Crocco in 1976; it's now part of a luxury goods group that also owns TAG Heuer. Its custom-built flagship on the east side of Fifth Avenue between 57th and 58th Streets, designed in 2015 by Peter Marino, is an elegant extension of the brand's stunning timepieces.